Dahongshan Copper 435 Middle Of The 54-58 Panel Stability Study

With the continuous improvement of the level of science and technology, water conservancy and hydropower, transportation, resource development and nuclear industries testing and something closely related to underground engineering have the rapid development, but also questioning the safety of the production of higher demand. Once the large-span of the cavern, excavation or mining deposits occurred during the cave, collapse, flooding and other accidents, the consequences would be extremely serious and a great loss. Therefore, the stability of surrounding rock mined-out area has become every underground project factor that can not be ignored. In this paper, according to geological characteristics, hydro-geological conditions and mining technical conditions Dahongshan copper mining, using finite element numerical simulation software ANSYS, establish three-dimensional solid model of ore mining process and filling process of the 435 middle 54-58 panel.The completion of research papers are as follows:(1) through the on-site investigation and geological data collection of the 435 middle 54-58 panel,in combination with ore mining and technical conditions, taking into account similar to the mining experience in production technology, the design parameters is provided by the Department to conduct basic data analysis.(2) According to the panel the basic situation, combined with security and economic factors, the two model optimization programs are established.(3) Using finite element software ANSYS, three-dimensional solid model is established.The first program in the course of the calculation does not converge, so use the second program, its excavation and filling process of numerical simulation is calculated.The analysis of displacement, stress and plastic strain distribution and size characteristics have been obtained, to provide a theoretical stability analysis basis in the next step.(4) According to the mechanism damage of rock mass characteristics and the results numerical simulation, analyze the stability of the surrounding rock mined-out area. The damage may occur due to tensile stress while the local caving. When mining extraction panel II, the people made Pillar will take place larger horizontal displacement, maximum reaching to 57mm. If not promptly filling panel II, the people made Pillar will be disruptive.(5) Further study the stability effects of the 435 middle 58-60 panel on the 435 middle 54-58 panel. There is 10m between the two panels and the 435 middle 54-58 panel has been filled, so little influence.(6) Combined with Dahongshan copper mining deep rock having more faults, studying a variety of commonly used measures to evaluate the roof control, and providing targeted protection measures and recommendations to Dahongshan copper.